Add missing datetime import to support_docs module

- Import datetime for conversation export timestamp functionality

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

support_docs.py

@@ -3,6 +3,7 @@ Support documentation module with accordion-style help sections
 """
 
 import gradio as gr
+from datetime import datetime
 
 def create_support_docs():
     """Create the support documentation interface with accordion menus"""